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Home✈️Aircraft🚁HelicopterThunder TigerOther › belt issue on the new R50SE
06-15-2009 09:25 PM  11 years ago
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PAHelinut

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PA USA

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belt issue on the new R50SE
I was at the field today when I noticed after the first flight that the belt was loose. I loosened up the 4 bolts that clamp the boom and the clamp for the boom supports and pulled the boom back and tightened the belt again. I then went for another flight checked the belt after a couple minutes of flying and the belt was loose again! At this time a friend and fellow heli flyer showed up at the field and he helped me by pulling the boom back while I held the main part of the heli and I again tightened the the belt back up. I marked the boom right by the frame just to see if the boom was indeed moving foreward. I went for another flight and sure enough the belt came loose after less then 2 minutes of flying. When I say loose I mean the belt is so loose you could pull it off the gear every time! The strange thing is that when I loosened up the 4 bolts that clamp the boom on the boom actually moves back. The boom support clamp is holding it's position causing enough pressure when the boom moves foreward to make the boom spring back from the pressure in the boom supports. The belt is installed correctly and the head and tail spin free and very smooth. Any one else have this issue? I'm at a loss.
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06-15-2009 09:39 PM  11 years ago
alvinrc

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Mobile, AL, USA

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Make sure you loosen up the rear boom supports clamp when pulling boom back to tension belt then tighten back up after boom is repositioned for proper tension.

You may have to put a wrap of tape on boom where it contacts in the main frame to get a better grip on it.
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06-15-2009 09:41 PM  11 years ago
PAHelinut

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PA USA

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Yep I loosened up the rear boom support everytime.
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06-15-2009 10:22 PM  11 years ago
RaptorMan23

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Sioux City, IA

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Are you sure that youve got the boom in right? It only goes in one way, if you dont get the notches in the boom aligned with the notches in the frame it will come loose constantly. If its in right, you shouldnt be able to turn the boom at all with the boom nuts loosened
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06-15-2009 10:46 PM  11 years ago
PAHelinut

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PA USA

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The boom is in right and is in the notches. I can't rotate the boom with the bolts loosened.
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06-15-2009 10:58 PM  11 years ago
RappyTappy

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Encinitas, CA

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I concur with others, a wrap or two of electrical tape around the
boom cures the boom moving in the frame clamps.
Still buyin' and flyin' then crashing and cryin'
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06-16-2009 07:52 AM  11 years ago
Gambirro

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Olavarria, Pcia de buenos aires - Argentina

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I had the same probelm with a titan a few months ago.
What I did was sanded both sides of the chassis in the area where the boom goes hosted to give more light. This way when one adjusts the 4 screws, the chassis can squeeze more boom.
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06-16-2009 02:27 PM  11 years ago
Swoop

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Newark, DE USA

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I had the same probelm with a titan a few months ago.
What I did was sanded both sides of the chassis in the area where the boom goes hosted to give more light. This way when one adjusts the 4 screws, the chassis can squeeze more boom.
^^This my prefered method. Also, initially if you overtighten the screws I believe it can slightly deform the clamping mechanism causing future adjustments to not hold.

Roughing up the boom with sandpaper in the area of the clamp can also add some holding power.
Chris
X50, B320, Radix, Spartan
Titan,Kasama,MP5,Radix,JR770
Trex450SE,MavrikkG5,Phoenix35
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06-16-2009 04:24 PM  11 years ago
jschenck

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La Vista, NE.

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+another - "put tape on it". this is even a bigger issue with the Titan tail booms as I think they are teflon coated. I actually use clear cellophane tape ("Scotch tape".
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06-16-2009 08:20 PM  11 years ago
PAHelinut

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PA USA

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Thanks for the input guys! I ended up putting clear packing tape from the dollar store. Took it out today and flew the heck out of it and the boom didn't move so looks like the tape did the trick.
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